Green Plumbing

Category - Caring for Our Planet

What is the term for the type of energy that the Earth expends as it cools down from the sun’s heat?
  1. Ultraviolet heat
  2. Thermal warmth
  3. Infrared radiation
  4. Conductive energy
Explanation
Answer: C - Infrared radiation is produced by the Earth as a means of cooling from the heat it absorbs from the sun. As this infrared radiation moves to escape the atmosphere, some of it is absorbed by greenhouse gases in the atmosphere. This in turn warms the atmosphere, and Earth itself.
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